# 14 C.F.R. § 29.619 (2026): Special factors

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_619

## Section

- **Citation:** 14 C.F.R. § 29.619 (2026)
- **Heading:** Special factors
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 14 CFR: Aeronautics and Space / Chapter I: FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION / Part 29: AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT / Subpart D: Design and Construction / § 29.619: § 29.619   Special factors.

## Text

(a) The special factors prescribed in §§ 29.621 through 29.625 apply to each part of the structure whose strength is—
(1) Uncertain;
(2) Likely to deteriorate in service before normal replacement; or
(3) Subject to appreciable variability due to—
(i) Uncertainties in manufacturing processes; or
(ii) Uncertainties in inspection methods.
(b) For each part of the rotorcraft to which §§ 29.621 through 29.625 apply, the factor of safety prescribed in § 29.303 must be multiplied by a special factor equal to—
(1) The applicable special factors prescribed in §§ 29.621 through 29.625; or
(2) Any other factor great enough to ensure that the probability of the part being understrength because of the uncertainties specified in paragraph (a) of this section is extremely remote.

## Nearby sections

- [14 C.F.R. § 29.601 (2026) § 29.601   Design.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_601.md)
- [14 C.F.R. § 29.602 (2026) § 29.602   Critical parts.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_602.md)
- [14 C.F.R. § 29.603 (2026) § 29.603   Materials.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_603.md)
- [14 C.F.R. § 29.605 (2026) § 29.605   Fabrication methods.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_605.md)
- [14 C.F.R. § 29.607 (2026) § 29.607   Fasteners.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_607.md)
- [14 C.F.R. § 29.609 (2026) § 29.609   Protection of structure.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_609.md)
- [14 C.F.R. § 29.610 (2026) § 29.610   Lightning and static electricity protection.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_610.md)
- [14 C.F.R. § 29.611 (2026) § 29.611   Inspection provisions.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_611.md)
- [14 C.F.R. § 29.613 (2026) § 29.613   Material strength properties and design values.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_613.md)
- [14 C.F.R. § 29.619 (2026) § 29.619   Special factors.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_619.md)
- [14 C.F.R. § 29.621 (2026) § 29.621   Casting factors.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_621.md)
- [14 C.F.R. § 29.623 (2026) § 29.623   Bearing factors.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_623.md)
- [14 C.F.R. § 29.625 (2026) § 29.625   Fitting factors.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_625.md)
- [14 C.F.R. § 29.629 (2026) § 29.629   Flutter and divergence.](https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_629.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T14_P29_S29_619. Check the current official text before relying on it. Not legal advice.